Hex head aircraft bolts are made of high-strength type 4037 or 8740 alloy steel (type 8740 is most commonly used). The bolts are centerless ground and threaded after heat treatment. Minimum tensile strength 125,000 PSI. Cadmium plated per specification QQ-P-416A, Type II, Class 3. Available with shank drilled for cotter pin or undrilled for stop nut application, and with or without drilled head for safety wire. Specify bolts to have undrilled shank by adding letter "A" after the dash number. For bolts with drilled head add letter "H" after the AN number. See illustrated examples. "C" represents Type 431 Stainless Steel (contains iron which is magnetic). The length of AN aircraft bolts is measured from under the head to the end of the shank. The "grip" is the unthreaded portion of the shank. See table for conversion of length and/or grip to proper AN callout.

15% discount on qty of 50-99
20% discount on qty of 100+

Note: Drilled bolts listed above are drilled shank only. To order drilled head only or both drilled head and shank bolts, please use our AN Bolt Selector by clicking the link below.

I get all the AN hardware for my race car from Aircraft Spruce. Excellent quality with graduated grip lengths so that the threaded portion of the bolt is never in the rod end or other stressed part. Note however that the dash number does not refer to the the grip length in 16ths of an inch. For instance a dash 12 bolt has a grip length of 13/16 and a dash 13 bolt has a grip length of 15/16, so order carefully to get what you want.

by
Rick

03/24/2018

size I ordered fit perfect

by
Dick M

04/30/2018

How does one review a bolt? I just know that hardware purchased from Aircraft Spruce is going to be acceptable hardware for aircraft use. Thanks. DHM.

by
Ray T

05/16/2018

Item as described, promptly shipped.

by
Curt B

05/21/2018

Quality hardware from and excellent supplier-Aircraft Spruce!

by
Steve

07/20/2018

What is the dash number of AN bolts?
The dash number designates the size and completes the part number. Example part numbers would be AN5-4, AN5-5, AN5-6, etc.
What are the quantities for price breaks and the standard package quantities? I know you'll send any quantity, but I'd order above the price breaks and in multiples of the package quantities if they were listed.
The discount schedule for large quantities are: 50-100 = 15% / 100+ = 20%. Package quantities are usually 25 but we can sort them however you prefer as long as you mention it in special instructions at checkout.